Lucas and Luna examine the Linux ecosystem as it powers everything from cloud servers to embedded devices. They trace the evolution of major distributions — Fedora's upstream-first philosophy, Debian's stability-first governance, and the commercial strategies behind Ubuntu and RHEL — without rehashing release notes. Each episode picks one layer of the stack: the container runtime that changed deployment (Docker, Podman), the systemd debate, or why Wayland still hasn't fully replaced X11 on the desktop. They also cover real-world migrations: a startup moving from CentOS to Rocky Linux, a government agency choosing OpenSUSE Leap for long-term support, and the kernel patching workflow at a FAANG-scale datacenter. Lucas brings the command-line fluency — package managers, filesystem hierarchy, SELinux contexts — while Luna asks the questions that matter to sysadmins and developers: What breaks when you upgrade? How do you audit a distro's supply chain? Can Linux ever win the desktop without
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What is The Linux Podcast with Fexingo: Open Source Operating Systems, Distros, and Server Stack?
The Linux Podcast with Fexingo: Open Source Operating Systems, Distros, and Server Stack is a business podcast hosted by Fexingo, with 154 episodes on record and a Required Pod Score of 80. PitchCentric scores this show on Booking Probability, Listen Score, and live audience signals refreshed every 24 hours.
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Fexingo hosts The Linux Podcast with Fexingo: Open Source Operating Systems, Distros, and Server Stack, a business show with 154 episodes published.
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Episode #159
How Linux Kernel Samepage Merging Reduces Memory Waste
Aug 19, 20269 minS4
In this episode of The Linux Podcast with Fexingo, Lucas and Luna dig into Kernel Samepage Merging (KSM) — the Linux kernel feature that deduplicates identical memory pages across processes. They explain how KSM works, why it matters for virtualization and container workloads, and where it can actually hurt performance. Using the classic example of multiple virtual machines running the same guest OS, they break down the trade-offs between memory savings and CPU overhead. They also touch on practical tuning: when to enable KSM, how to monitor its effectiveness with tools like ksmctl, and why it's often disabled by default in modern hypervisors like KVM. This episode gives you a concrete mental model of memory deduplication in Linux, plus a few real-world considerations for your own servers. #Linux #Kernel #KSM #MemoryManagement #Virtualization #KVM #Containers #Docker #SystemAdministration #DevOps #ServerStack #OpenSource #Technology #FexingoBusiness #BusinessPodcast #CloudComputing #MemoryDeduplication #LinuxPerformance Keep every episode free: buymeacoffee.com/fexingo
How Linux io_uring and eBPF Transform Network Performance
Aug 18, 20268 minS4
In episode 158 of The Linux Podcast with Fexingo, Lucas and Luna dig into the real-world impact of combining io_uring with eBPF for high-speed networking. They unpack how these two kernel technologies work together to slash latency and boost throughput, using the example of a hypothetical CDN edge server handling millions of requests. The conversation covers the mechanics of both systems, the challenges of integration, and practical advice for developers looking to experiment. They also touch on the broader trend of kernel-bypass alternatives and why io_uring and eBPF are becoming the go-to for performance-critical applications. A concrete, accessible look at cutting-edge Linux internals. #Linux #io_uring #eBPF #Networking #Kernel #Performance #Technology #OpenSource #CDN #XDP #SysAdmin #DevOps #Cloud #Server #FexingoBusiness #BusinessPodcast #TechPodcast #LinuxPodcast Keep every episode free: buymeacoffee.com/fexingo
Lucas and Luna dive into eBPF, the kernel technology that lets you trace network packets and system calls without adding any overhead. They start with a concrete example: using bpftrace to answer a question that would normally take hours of digging through tcpdump logs. Along the way, they explain what eBPF is, why it's a game-changer for observability, how it compares to older tools like tcpdump and strace, and why the Linux kernel can run these programs safely. They also touch on how companies like Netflix and Facebook use eBPF in production, and what that means for anyone running a server today. If you've ever wanted to see inside your kernel, this episode gives you the perfect entry point. #eBPF #Linux #Observability #Kernel #Bpftrace #Networking #SysAdmin #DevOps #Performance #Trace #FexingoBusiness #Technology #OpenSource #LinuxKernel #CloudNative #Troubleshooting #PacketAnalysis #Security Keep every episode free: buymeacoffee.com/fexingo
How Linux io_uring and XDP Combine for High-Speed Networking
Aug 16, 202612 minS4
Episode 156 of Fexingo's Linux podcast dives into the rare but powerful pairing of io_uring and XDP for high-speed networking. Lucas and Luna explain how io_uring's asynchronous I/O model meets eXpress Data Path's early packet processing, cutting latency and CPU overhead in demanding server workloads. They use a concrete example from a typical cloud gateway, walk through the mechanics of both technologies, and discuss where the combination shines—and where it doesn't. If you've wondered how modern Linux handles millions of packets per second without melting the CPU, this episode gives you the mental model and the pitfalls to watch. No fluff, just the technical details that matter for sysadmins, developers, and anyone running network-heavy services. #LinuxNetworking #io_uring #XDP #HighPerformanceComputing #ServerTech #NetworkStack #AsyncIO #Kernel #SysAdmin #DevOps #CloudInfrastructure #PacketProcessing #Technology #OpenSource #FexingoBusiness #BusinessPodcast #TechPodcast #LinuxPerformance Keep every episode free: buymeacoffee.com/fexingo
Episode 155 of The Linux Podcast dives into Bcache, the Linux kernel block-layer caching that lets you put a fast SSD in front of slow spinning disks. Lucas and Luna walk through how Bcache works at the block level, why it's different from filesystem-level caching, and where it shines—like speeding up database storage or home lab NAS builds without ripping out existing drives. They break down the key concepts: caching modes (writeback, writethrough, writearound), the bucket and priority cache structure, and how to attach a cache device to a backing device. They also touch on real-world performance numbers, like how Bcache can slash read latency from tens of milliseconds to under a millisecond for hot data, and discuss the trade-offs, including writeback risks and the importance of a UPS. The episode wraps with a look at Bcachefs, the next-gen filesystem that builds on Bcache's ideas, and a practical tip for anyone considering Bcache in their own setup. If you've ever wanted to squeeze more life out of old hard drives, this is the episode for you. #Bcache #Linux #BlockCaching #SSD #HDD #Storage #Kernel #Filesystem #Bcachefs #NAS #HomeLab #Performance #Writeback #Writethrough #Technology #OpenSource #FexingoBusiness #BusinessPodcast Keep every episode free: buymeacoffee.com/fexingo
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